<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title>透明度</title>
		<style type="text/css">
			#adv{
				opacity: 0.3;
			}
		</style>
	</head>
	<body>
		<div>
			<img id="adv" src="../day10/reg-mobile.jpg" height="400px" width="800px" >
		</div>
	</body>
</html>
